Abstract
ABSTRACT This study measures the economic and environmental outcomes associated with using two-, three- and four-year seed potato rotations in Southeastern Idaho. Seed potatoes are rotated with spring wheat, feed barley, oats, and canola. Crop yields, nitrogen loss, and soil erosion are simulated using the EPIC biological simulation model. A tradeoff frontier approach is used to screen out inferior rotations and to calculate tradeoffs between economic returns, reduced nitrogen loss, and reduced soil erosion. The results reveal that the most profitable and environmentally sound rotations tend to be three-year rotations of potatoes followed by two grain crops, with spring wheat occurring at least once in the crop sequence. A two-year potato-wheat rotation resulted in the largest economic return, a three-year potato-wheat-wheat rotation resulted in the second largest return and the smallest soil erosion, and a four-year potato-barley-wheat-wheat rotation resulted in the smallest nitrogen loss.
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